The Pentair C21-2 is a Diffuser Ring. This ring is compatible with D-Series Self Priming Centrifugal Pump and Sta-Rite® ED Series Gas Engine Self Priming Centrifugal Pump. It is a genuine Pentair product.
O-Ring Strainer Lid Bs452a Hydrostar Plus Composite
Price: $21.90
Strainer Basket Infiium Eco V-Series Only
Price: $19.31
#2-014 Impeller Lock O-Ring for Ultra-Flow Pool Pump
Price: $1.69
#2-228 Collar and Rotor Union O-Ring
Price: $2.59